I am stuck...please help.
Here is the equation: y=-2x^2+24x-70
find the y intercept
find the x intercept
find the vertex
the x-value for the vertex is given by: $\displaystyle x = \frac {-b}{2a}$
where a is the coefficient of x^2, b is the coefficient of x and c is the constant term. then you plug in whatever value you get for x to find the corresponding y-value, so you can get the coordinate point for the vertex
i suppose you have no problems with finding the intercepts?
for x-intercept, replace y with zero and solve for x
for y-intercept, replace x with zero and solve for y